Straight run requirements for a restriction orifice?

[skuntz]

We are installing an RO to let down the pressure downstream of a control valve. Since we are only taking a pressure drop and not taking flow measurements, is it necessary to have straight run requirements?

 

[pennpiper]

skuntz,
No, if you are not measuring then you do not need any straight run.

Sometimes its possible to do all the right things and still get bad results